Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1993-08-03
1994-12-20
Jagannathan, Vasu S.
Paper making and fiber liberation
Processes and products
Non-fiber additive
525269, 525285, 525291, 525293, 525296, 525301, 525303, 525308, 210734, 1621682, D21H 2110, C02F 156, C08F26510
Patent
active
053743369
ABSTRACT:
A water soluble graft copolymer useful as retention and drainage aids in papermaking processes having the structure: ##STR1## wherein E is the repeat unit obtained after polymerization of an .alpha.,.beta. ethylenically unsaturated compound, the molar percentage of a:b is from about 95:5 to 5:95, with the proviso that the sum of a and b equals 100%; G comprises the structure: ##STR2## wherein d is a cationic monomer, R.sub.1, R.sub.2 and R.sub.3 are the same or different and are hydrogen or a lower alkyl group having C.sub.1 to C.sub.3, F is the salt of an ammonium cation and the molar percentage of c:d is from 95:5 to 5:95 with the proviso that the sum of c and d equals 100%.
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Chen Fu
Liao Wen P.
Lin John T.
Betz Laboratories Inc.
Hill Gregory M.
Jagannathan Vasu S.
Ricci Alexander D.
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